.page-faq {
  --faq-nav-w: 252px;
  --faq-cyan-line: 1px solid rgba(0, 229, 208, 0.20);
  --faq-soft-line: 1px solid rgba(167, 182, 200, 0.14);
  --faq-tint: rgba(0, 229, 208, 0.06);
  background: var(--c-ink);
  color: var(--c-paper);
  overflow-x: clip;
}

.page-faq .crumbs {
  padding: 22px 0 0;
}

.page-faq .crumbs ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

.page-faq .crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(167, 182, 200, 0.5);
}

.page-faq .crumbs a {
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
}

.page-faq .crumbs a:hover {
  color: var(--c-cyan);
  border-bottom-color: var(--c-cyan);
}

/* ---------- 首屏：非对称分屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 34px;
  padding: 30px 0 46px;
}

.page-faq .faq-eyebrow {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-faq .faq-hero h1 {
  margin: 0 0 20px;
  font-size: var(--fz-56);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.02;
  max-width: 18ch;
}

.page-faq .faq-hero .lede {
  margin: 0;
  max-width: 62ch;
  font-size: var(--fz-16);
  line-height: 1.85;
  color: var(--c-mist);
}

.page-faq .faq-hero__facts {
  background: var(--c-navy);
  border-left: 2px solid var(--c-cyan);
  padding: 24px 22px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-faq .faq-facts {
  margin: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-facts > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: var(--faq-soft-line);
}

.page-faq .faq-facts > div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-facts dt {
  font-size: 13px;
  color: var(--c-mist);
  letter-spacing: 0.04em;
}

.page-faq .faq-facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--c-cyan-soft);
  text-align: right;
}

/* ---------- 斜切分区带 ---------- */
.page-faq .faq-slash {
  height: 44px;
  margin-bottom: 6px;
  background: linear-gradient(90deg, var(--c-navy) 0%, rgba(11, 27, 51, 0.35) 72%, rgba(5, 11, 24, 0) 100%);
  border-top: var(--faq-cyan-line);
  transform: skewY(-1.4deg);
  transform-origin: left center;
}

/* ---------- 两栏主体 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 34px;
  padding: 34px 0 72px;
}

.page-faq .faq-jump {
  border-left: var(--faq-cyan-line);
  padding-left: 16px;
}

.page-faq .faq-jump__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-mist);
}

.page-faq .faq-jump ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-faq .faq-jump a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 10px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--c-paper);
  text-decoration: none;
  border: 1px solid rgba(167, 182, 200, 0.16);
  transition: color 0.2s var(--ease-out), background 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
}

.page-faq .faq-jump a:hover,
.page-faq .faq-jump a:focus-visible {
  color: var(--c-cyan-soft);
  background: var(--faq-tint);
  border-color: rgba(0, 229, 208, 0.4);
}

.page-faq .faq-jump__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-cyan);
}

.page-faq .faq-jump__hint {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--c-mist);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  padding: 8px 0 26px;
  scroll-margin-top: 104px;
}

.page-faq .faq-group + .faq-group {
  margin-top: 32px;
  padding-top: 40px;
  border-top: var(--faq-soft-line);
}

.page-faq .faq-group__head {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
  max-width: 70ch;
}

.page-faq .faq-group__head .mono-index {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--c-cyan);
}

.page-faq .faq-group h2 {
  margin: 0;
  font-size: var(--fz-26);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.page-faq .faq-group__intro {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-mist);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  position: relative;
  border-top: var(--faq-soft-line);
}

.page-faq .faq-list > .faq-item:last-child {
  border-bottom: var(--faq-soft-line);
}

.page-faq .faq-item > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 20px 38px 20px 0;
  font-size: var(--fz-19);
  font-weight: 600;
  line-height: 1.5;
  color: var(--c-paper);
  transition: color 0.2s var(--ease-out), padding-left 0.25s var(--ease-out);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::after {
  content: "↗";
  position: absolute;
  right: 4px;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--c-cyan);
  transition: transform 0.28s var(--ease-out);
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(92deg);
}

.page-faq .faq-item[open]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--c-cyan) 0%, rgba(0, 229, 208, 0.25) 60%, rgba(0, 229, 208, 0) 100%);
}

.page-faq .faq-item[open] > summary {
  color: var(--c-cyan-soft);
  padding-left: 20px;
}

.page-faq .faq-item__num {
  flex: none;
  padding-top: 7px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-mist);
}

.page-faq .faq-item__a {
  padding: 0 0 30px;
  font-size: var(--fz-16);
  line-height: 1.85;
  color: var(--c-paper);
  transition: padding-left 0.25s var(--ease-out);
}

.page-faq .faq-item[open] .faq-item__a {
  padding-left: 20px;
}

.page-faq .faq-answer-lead {
  margin: 0 0 18px;
  padding: 13px 16px;
  background: var(--faq-tint);
  border-left: 2px solid var(--c-cyan);
  font-weight: 600;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-paper);
}

.page-faq .faq-text {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--c-mist);
  max-width: 66ch;
}

.page-faq .faq-text:last-child {
  margin-bottom: 0;
}

.page-faq .faq-text a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 208, 0.45);
  transition: color 0.2s var(--ease-out);
}

.page-faq .faq-text a:hover {
  color: var(--c-cyan-soft);
}

.page-faq .faq-steps {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-faq .faq-steps li {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-faq .faq-steps__num {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-cyan);
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(0, 229, 208, 0.45);
}

.page-faq .faq-steps p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-faq .faq-steps a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 208, 0.45);
}

.page-faq .faq-steps a:hover {
  color: var(--c-cyan-soft);
}

.page-faq .faq-bullets {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-bullets li {
  position: relative;
  padding-left: 20px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-faq .faq-bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 9px;
  height: 1px;
  background: var(--c-cyan);
}

.page-faq .faq-figure {
  margin: 22px 0 18px;
}

.page-faq .faq-figure .media-frame {
  border: var(--faq-cyan-line);
  background: var(--c-navy);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-mist);
}

/* ---------- 联系与收尾 ---------- */
.page-faq .faq-group--contact {
  margin-top: 40px;
  padding: 34px 22px 30px;
  background: var(--c-navy);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-faq .faq-contact {
  display: grid;
  gap: 14px;
  margin-bottom: 22px;
}

.page-faq .faq-contact .contact-item {
  background: rgba(5, 11, 24, 0.55);
  border-top: 2px solid var(--c-cyan);
  padding: 16px 18px;
}

.page-faq .faq-contact .contact-item__key {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--c-mist);
  text-transform: uppercase;
}

.page-faq .faq-contact .contact-item__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--c-paper);
  word-break: break-word;
}

.page-faq .faq-ask {
  margin-top: 26px;
  padding-top: 22px;
  border-top: var(--faq-soft-line);
}

.page-faq .faq-ask__title {
  margin: 0 0 14px;
  font-size: var(--fz-19);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--c-paper);
}

.page-faq .faq-ask .faq-bullets {
  margin-bottom: 0;
}

.page-faq .faq-next {
  margin-top: 26px;
  display: grid;
  gap: 2px;
  border-top: var(--faq-soft-line);
}

.page-faq .faq-next a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 2px;
  font-size: 15px;
  color: var(--c-paper);
  text-decoration: none;
  border-bottom: var(--faq-soft-line);
  transition: color 0.2s var(--ease-out), padding-left 0.2s var(--ease-out);
}

.page-faq .faq-next a::after {
  content: "→";
  font-family: var(--font-mono);
  color: var(--c-cyan);
}

.page-faq .faq-next a:hover {
  color: var(--c-cyan-soft);
  padding-left: 8px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-faq .faq-group--contact {
    padding: 38px 30px 34px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.4fr) minmax(250px, 0.6fr);
    gap: clamp(36px, 6vw, 88px);
    align-items: end;
    padding: 46px 0 60px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-nav-w) minmax(0, 1fr);
    gap: clamp(40px, 6vw, 96px);
    padding: 48px 0 96px;
    align-items: start;
  }

  .page-faq .faq-jump {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-jump ol {
    display: grid;
    gap: 2px;
  }

  .page-faq .faq-jump a {
    border-color: transparent;
    padding: 9px 12px 9px 6px;
  }

  .page-faq .faq-group {
    padding-bottom: 34px;
  }

  .page-faq .faq-group + .faq-group {
    margin-top: 44px;
    padding-top: 52px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-contact {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item > summary,
  .page-faq .faq-item__a,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-jump a,
  .page-faq .faq-next a,
  .page-faq .crumbs a {
    transition: none;
  }

  .page-faq .faq-slash {
    transform: none;
  }
}